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Method for preparing TiB2/TiC (titanium diboride/titanium carbide) ultrafine powder for surface spraying of engine piston ring by means of high energy ball milling

A technology of high-energy ball milling and surface spraying, which is applied in the direction of coating, molten spraying, metal material coating technology, etc., can solve problems such as not being ideal, and achieve the effects of increased productivity, cheap reaction raw materials, high hardness and wear resistance

Inactive Publication Date: 2012-05-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as self-propagating high-temperature synthesis can also prepare nano-sized TiB 2 , but requires subsequent processing such as pickling and crushing, which is obviously not an ideal method

Method used

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  • Method for preparing TiB2/TiC (titanium diboride/titanium carbide) ultrafine powder for surface spraying of engine piston ring by means of high energy ball milling
  • Method for preparing TiB2/TiC (titanium diboride/titanium carbide) ultrafine powder for surface spraying of engine piston ring by means of high energy ball milling
  • Method for preparing TiB2/TiC (titanium diboride/titanium carbide) ultrafine powder for surface spraying of engine piston ring by means of high energy ball milling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] ① Combine Ti and B 4 C is weighed according to the molar ratio of 3:1, a total of 50g, and dried at 80°C for 20 hours for later use;

[0018] ② Weigh stainless steel balls with diameters of 6, 10, 12, and 20mm according to the ball-to-material ratio of 10:1, totaling 500g, and set aside;

[0019] ③Select a 250Ml stainless steel ball mill tank, first put the reactants into the stainless steel tank, and then put the balls on the powder, almost except for some gaps, which can completely cover the powder, the balls account for about 2 / 3 of the volume of the ball mill tank , then put the head of the argon tube deep into the top layer of balls along the inner wall of the ball mill tank, the argon flow rate and pressure are 0.1Mpa, remove it after 10 minutes, and seal the ball mill tank;

[0020] ④ Select the rotational speed as 300r / min, ball mill for 60 hours, and set the machine to mill for half an hour and rest for half an hour;

[0021] ⑤ After 60 hours, open the ball m...

Embodiment 2

[0023] ① Combine Ti and B 4 C is weighed according to the molar ratio of 3:1, a total of 50g, and dried at 80°C for 20 hours for later use;

[0024] ② Weigh stainless steel balls with diameters of 6, 8, 12, and 20 mm according to the ball-to-material ratio of 10:1, totaling 500 g, and set aside;

[0025] ③Select a 250Ml stainless steel ball mill tank, first put the reactants into the stainless steel tank, and then put the balls on the powder, almost except for some gaps, which can completely cover the powder, the balls account for about 2 / 3 of the volume of the ball mill tank , then put the head of the argon tube deep into the top layer of balls along the inner wall of the ball mill tank, the argon flow rate and pressure are 0.1Mpa, remove it after 10 minutes, and seal the ball mill tank;

[0026] ④ Select the rotational speed as 400r / min, ball mill for 40 hours, and set the machine to ball mill for half an hour and rest for half an hour;

[0027] ⑤ After 40 hours, open the ...

Embodiment 3

[0029] ① Combine Ti and B 4 C is weighed according to the molar ratio of 3:1, a total of 50g, and dried at 80°C for 20 hours for later use;

[0030] ② Weigh stainless steel balls with diameters of 6, 8, 10, and 20 mm according to the ball-to-material ratio of 15:1, totaling 750 g, and set aside;

[0031] ③Select a 250Ml stainless steel ball mill tank, first put the reactants into the stainless steel tank, and then put the balls on the powder, almost except for some gaps, which can completely cover the powder, the balls account for about 2 / 3 of the volume of the ball mill tank , then put the head of the argon tube deep into the top layer of balls along the inner wall of the ball mill tank, the argon flow rate and pressure are 0.1Mpa, remove it after 10 minutes, and seal the ball mill tank;

[0032] ④ Select the rotational speed as 500r / min, ball mill for 20 hours, and set the machine to ball mill for half an hour and rest for half an hour;

[0033] ⑤After 20 hours, open the b...

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Abstract

The invention discloses a method for preparing TiB2 / TiC (titanium diboride / titanium carbide) ultrafine powder for surface spraying of an engine piston ring by means of high energy ball milling. The method includes the steps: (1) weighing Ti (titanium) powder and B4C (boron carbide) powder as powder materials, (2) weighing grinding balls, (3) placing the powder materials into a ball milling tank and then covering the powder materials with the grinding balls so as to press the upper surfaces of all the powder materials, (4) leading inert gas into the ball milling tank so as to exhaust air, and (5) performing ball milling. The method for mechanical alloying by means of high energy ball milling is used for in-situ synthesis of nanoscale metal ceramic composite TiB2 / TiC powder, vacuum pumping and argon filling during in-situ synthesis do not need to be performed in a vacuum glove box, accordingly, operation procedures are simplified, production efficiency is improved, and the method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of metal materials and relates to a method for preparing nano-scale TiB by mechanical alloying 2 / TiC cermet composite powder method. Background technique [0002] TiB 2 As cermet materials, TiC and TiC have the advantages of high melting point, low vapor pressure, good electrical conductivity, high hardness, and good wear resistance. TiB 2 TiC and TiC have been widely studied as one of the most promising materials because of the above-mentioned series of excellent properties. Currently, TiB 2 And TiC has been widely used in metallurgy, machinery, military, chemical industry, electronics and other industries as particle-reinforced composite materials, composite ceramic materials, hard alloy substrates, cathodic protection materials, and conductive ceramic materials. Work has focused on working with nanoscale TiB 2 Research and development of various new materials related to TiC. Preparation of TiB 2 The method...

Claims

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Application Information

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IPC IPC(8): B22F9/04C23C4/10
Inventor 王惜宝王金枝王海波
Owner TIANJIN UNIV
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